About this 3D model

This is a lens cap for the end of a 2 Inch Astronomical eyepiece. This is suitable for all 1.25 Inch eyepieces. Probably best to make it from HDPE as its more flexible. Though I have still to test it! There are also 1.25 and 0.965 sizes available! Oh, and Ive added in a 1.5mm air release hole. Not tested yet, so dont know how well the 2mm wall thickness holds up! Will let people know and upload a pic once its done! (I still need to finish making my makerbot, all electronics are nearly complete!) Edit: Edited to move Origin point to the centre of the part.